Valve



w. N SILVERNALE.

VALVE.

APPLICATION FILED 0cm. 1918.

1,374,244.- a ted Apr. 12, 1921;

J) g Sm cg 4) I m b M w N o a a Re Q a N K i S"?w% \H & r 5:

\ i/ g M WITNESSES IN V EN TOR.

BY w M rrso STATES PATENT OFFICE.

VTILLIAM N.

SILVERNALE, O33 KA'WKA'WLIN, li-HCHIGAII, ASSIGNOR T BENSON ELECTRICCOMPANY, A GOBPORATIGN 0F MINITESOTA.

VALVE.

invests.

Application filed G'ctober 8,

To all 101 a cm it may concern Be it known that l, VVILLIADI N. SrnvneKarin, a citizen of the United States, resid ing at Kawkawlin, in thecounty of Bay and State of Michigamhave invented certain new and usefulImprovements in Valves, of which it do hereby declare the following tobe a specification.

My invention relates to valves, and espe, cially balanced steam valves,and has for its object the. provision of a novel, simple and practicalvalve of that type. It consists of the structures, combinations andarrangements of parts hereinafter described and claimed,

In the drawing, the figure is central vertical longitudinal section ofmy said invention.

in said drawing, 1 is the body portion of valve housing provided with anintake port 1 and an exhaust port 1 Said exhaust port may, if desired,communicate with a steam whistle, not shown, or with the steam supplypipe of any steam operated device. Said housing has formed therein amain valve seat 1, against which main valve head 2 is adapted to bear.Said main valve in coiiperation with said main valve seat is adapted tonormally close direct communication between said intake port 1 and saidexhaust port 1. Formed in said valve head 2 is a chamber 2, through therear wall of which extends an intake port 2, and through the front wallof which extends an exhaust port 2 adapted to communicate at all timeswith said exhaust port 1". Upon said valve 2 there is preferably formedor secured a forwardly directed tubular nose or valve stem 2 adapted toextend into a'sleeve 3 mounted in the opposite wall of said housing.Said main valve head has formed thereon, an annular flange 2 adapted tocontact with th side walls of said housing whereby an annular chamber orspace 2 is formed between said walls and said main valve head forward ofsaid flange, said annular space being open to said main intake port.Extending through said sleeve and through said valve stem and valve headis the stem l of an auxiliary valve 4, which auxiliary valve is adaptedto bear against seat therefor formed in the outer face of the rear wallof said main valve and to close the intake port 2 in said main valvehead.

The rearward end of the body portion of Specification of Letters Patent.

Patented Apr. 12,1921.

1918. Serial No. 257,395.

said housing is open, and is adapted to be closed by a cover portion 1of any suitable structure, which preferably extends into said bodyportion, the inner face of said cover being spaced from the rearward endofsaid main valve when said main valve is closed against its seat. Asteam chamber 5 is thus formed between the inner face of said coverportion and the rearward end of said main valve. Said cover has a port 5formed in its inner face concentric with the auxiliary valve head d,into which the rearward end of said auxiliary valve head is adapted toloosely extend, which port is adapted to communicate in one directionwith said chamber 5 and in the other direction through a port 5" formedin said body with said in take port l Said sleeve 3 preferably extendsthrough the forward end of said housing and is provided at its outwardend with a flange 3 through which bolts 3 may be projected to secure itto said housing. Mounted on a support of any suitable construction, as

preferably upon a bracket '6 erect/ed upon 0 said sleeve intermediate ofsaid flange and said housing, is a bell crank level 7, one arm of whichis adapted in operation to bear against the outward end of saidauxiliary valve stem and to retract said auxiliary valve. A leveroperating cord or wire '7 is secured to the other arm of said lever foroperating the same. lhetravel of said-auxiliary valve in retractivedirection may, if desired, be limited by any suitable means, as by acollar or collars d mounted upon said valve stem 43 within said sleeve3.

In operation the direct flow of steam. from the main intake port 1 t0the main exhaust port 1 is normally out off by said main valve 2 andsaid main valve seat 1, at which time steam flows from said port 1through the ports 5' an l 5 and around the rearward end of the auxiliaryvalve into the chamber 5, forcing said auxiliary valve against its seaton said main valve and forcing said main valve against its seat on saidhousing. It

' will be obvious that the area of the rearward end of said main valveexposed to steam pressure in said chamber 5 is greater than the area ofthe forward face of theflange of said valve exposed to pressure from thefront, and that the area of the rearward end of said auxiliary valveexposed to pressure is comparatively very small. When said auxiliaryvalve is retracted, the steam from chamber 5 flows rapidly through theport relieving the pressure behind said main,

valve, whereupon the pressure forward of the flange of said main valvewill open said valve and steam will pass directly from said port 1through the main valve seat to said port 1 A drain port 1 is )referablyformed in said housing to drain condensed steam or moisture from saidhousing forward of said main valve seat.

- It is obvious that said structure may be modified in certainparticulars within the spirit and scope of my claim.

My invention may also be used for controlling the flow of other fluidthan steam.

l Vhat I claim is In a valve, the combination of a housing comprising abody portion and a cover, said housing having a main valve seatformedtherein, said housing having a main intake port formed therein at oneside of said seat and a main exhaust port formed therein at the oppositeside of said seat, a main valve head within said housing adapted to bearagainst said seat on the intake side thereof,

said valve head being provided with a tubular valve stem extendingthrough said seat and spaced therefrom, a stationary sleeve extendinginto one of the walls of said housing'and engaging the free end of saidstem, said main valve head having a steam chamber formed therein, saidmain valve head having an exhaust port formed therein leading from thesteam chamber therein to said main exhaust port, the rearward end ofsaid main valve head being spaced from the opposing inner face of saidcover portion to form a steam chamber in rear of said main valve headwhen said valve head 18 closed against its seat, said main valve headhaving an intake port formed therein extending from the steam chamber inrear thereof to the chamber within said valve head, said housing havingan intake port formed therein extending from said main intake port tosaid chamber in rear of said valve head, said main valve head having avalve seat formed in its rearward face concentric with the intake portthrough its rearward wall and concentric with the inward end of the portleading from said main intake port to said rearward steam chamber, asupplementary valve head, extending into said rearward steam chamber andadapted to be seated against the seat formed on the rearward face ofsaid main valve head and to close the intake port leading into thechamber in said valve head, said supplementary valve head being providedwith a valve stem extending through the intake port in said main valvehead and spaced therefrom and extending through the forward wall of saidmain valve head and main valve stem and sleeve longitudinally thereofand thence outwardly of said housing, travel limiting means mounted uponsaid auxiliary valve stem within said sleeve forward of said main valvestem, said main valve head having an annular, external flange formedthereon adapted to contact with the side walls of said housing whereby achamber or space is formed between said side walls and said main valvehead forward of said flange, the latter chamber or space being open tosaid main intake port, and

means for retracting said auxiliary valve head. v

In ,testnnony whereof, I hereunto allix my signature, in presence of twoWitnesses.

WILLIAM N. SILVERNALE.

Witnesses:

7 James T. VYATsoN,

Oscan S. JoHNsoN.

